initially i put about 1 - 2mm of Selley's 401 industrial grade silicon (withstands heat 205 deg/C) on the sides where the arking had caused burn marks and took it for a run with no misfire.. then 2 days later misfire came back... so pulled them out and put another 2 - 3mm layer all over the coils (total 4 - 5mm) this may seem too thick however silicon is flexable once dry and coils will fit in if applied neatly... i covered the top, bottom, sides, front, back... except where the rubber boots were... once dry i fit them back into their frames and put them back in... problem 100% solved (2 - 3 weeks so far of hard driving) and im pretty sure its a 100% fix cause unlike PVC tape and apoxy glue, silicon withstands high heat and is an excellent insulator...